to the united states. an extension of u.s. borders while beyond the physical borders of the united states. this is not the first time the migration policy institute has really delved deeply into enforcement issues. we deeply believe that immigration enforcement is key to the immigration system's integrity and to the ability of a government to do the smart things that they must do in order to take advantage of the opportunities that international migration makes possible. we have issued major reports going back almost to the beginning of the migration policy, now almost 11 years ago, with reports falling 9/11, in- depth investigations of the v isa system and investigations of cooperation transatlantic link. the-trans atlantic -- trans atlanticly. the report details what those corporations have enabled us to do. it is a system that we now have. system in which the whole is much thicker than the sum of its parts. the speakers will present -- is much bigger than the sum of its parts. we will start with doris m